Okay, so Bella meeting Nessie for the first time and finding out Jacob imprinted on her was definitely the turning point of the book. Before that, the book was very good; easily the best of the series; and after, large parts of it read like, as I previously mentioned, bad fan fiction. The whole thing with Nessie the rapidly-maturing super baby was just weird, to be honest. As for her special power, well, Stephenie just took that from The Giver (do you think that was the second book she was inspired by for this one? She said that she was influenced by A Midsummer Night's Dream and another one that she wouldn't reveal, so I figured it MUST be The Giver.)
After a little while, I found myself growing bored with Bella's interaction with the other Cullens. I guess that's just because everything revolved around Nessie and the other clans, and they were the two low points of the book. Speaking of which, I did NOT like the other vampires that visited; the only ones I didn't mind were Tanya and Kate, while the rest were just taking up space and writing. They were kind of like the Potentials on Buffy. Alice and Jasper's absence didn't help much, either; they're my favorite characters.
I did like Bella's interaction with the other characters, though...her scenes with Charlie and the other humans were more enjoyable because they actually talked about things besides Nessie and the other vampires' special powers. And I wish we'd seen Jasper and Alice's meetings with J. Jenks...I wanna know what happened there.
The ending left SO much to be desired. I wish I could complain and say that Stephenie was too risky; she wasn't being risky enough! She was clearly just giving the fans what they wanted (a happy ending for Edward and Bella, Jacob imprinting on someone else, yadda yadda yadda.) And could the "battle" with the Volturi have been more anticlimactic? It went like this:
Jane: GASP! Why aren't our powers working on them?
Aro: It must be Bella, the super perfect vampire!
Bella: Mwahahahaha! You can never break my shield!
All non-Volturi vampires: BELLA, YOU'RE THE BEST! YOU'RE PERFECT AND SPARKLY AND WE ALL LOVE YOU!
Edward: Let's have lots of off-screen sex!
...if you didn't notice, yes, I definitely think Bella needs more flaws. I was hoping she'd become more flawed when she became a vampire, what with the bloodlust, but I was wrong. I still think that Bella was much more likable as a vampire than as a human, but that doesn't change the fact that she's a static, flawless character who needs to be toned down a few notches. I wish Stephenie had her kill someone just so she could have SOMETHING wrong with her.
Okay, back to my annoyance with the ending. What was the deal with that? I think it would've been much better if the Volturi had actually taken Nessie. Okay, fine, it would depress the teenie-bopper fans that just want to have Bella and Edward have a perfect happy ending, but it would have been a good closing statement and it definitely would have allowed for a lot of much-needed character development for Bella and Edward. Or maybe I've been watching too many Joss Whedon shows.
Overall? I absolutely loved the first 450 pages or so, but after that, I was completely disappointed. Meh, oh well. At least they got a happy ending, right?